We study the processes e+e-âγISRJ/Ï, where J/ÏâÏ+Ï-Ï0, J/ÏâK+K-Ï0, and J/ÏâKS0K±Ïâ using a data sample of 519 fb-1 recorded with the BABAR detector operating at the SLAC PEP-II asymmetric-energy e+e- collider at center-of-mass energies at and near the Ï(nS) (n=2,3,4) resonances. We measure the ratio of branching fractions R1=B(J/ÏâK+K-Ï0)B(J/ÏâÏ+Ï-Ï0) and R2=B(J/ÏâKS0K±Ïâ)B(J/ÏâÏ+Ï-Ï0). We perform Dalitz plot analyses of the three J/Ï decay modes and measure fractions for resonances contributing to the decays. We also analyze the J/ÏâÏ+Ï-Ï0 decay using the Veneziano model. We observe structures compatible with the presence of Ï(1450) in all three J/Ï decay modes and measure the relative branching fraction: R(Ï(1450))=B(Ï(1450)âK+K-)B(Ï(1450)âÏ+Ï-)=0.307±0.084(stat)±0.082(sys).
Dalitz plot analyses of J /Ï âÏ+Ï-Ï0, J /Ï âk+K-Ï0, and J /Ï â Ks0 K±Ïâ produced via e+e- annihilation with initial-state radiation
Batignani, G.;Bettarini, S.;Casarosa, G.;Forti, F.;Giorgi, M. A.;Paoloni, E.;Rizzo, G.;Lueck, T.;
2017-01-01
Abstract
We study the processes e+e-âγISRJ/Ï, where J/ÏâÏ+Ï-Ï0, J/ÏâK+K-Ï0, and J/ÏâKS0K±Ïâ using a data sample of 519 fb-1 recorded with the BABAR detector operating at the SLAC PEP-II asymmetric-energy e+e- collider at center-of-mass energies at and near the Ï(nS) (n=2,3,4) resonances. We measure the ratio of branching fractions R1=B(J/ÏâK+K-Ï0)B(J/ÏâÏ+Ï-Ï0) and R2=B(J/ÏâKS0K±Ïâ)B(J/ÏâÏ+Ï-Ï0). We perform Dalitz plot analyses of the three J/Ï decay modes and measure fractions for resonances contributing to the decays. We also analyze the J/ÏâÏ+Ï-Ï0 decay using the Veneziano model. We observe structures compatible with the presence of Ï(1450) in all three J/Ï decay modes and measure the relative branching fraction: R(Ï(1450))=B(Ï(1450)âK+K-)B(Ï(1450)âÏ+Ï-)=0.307±0.084(stat)±0.082(sys).I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.